11 (2 marks) The relationship between NPV and IRR is such that a. both approaches always provide the same ranking of alternative investment projects. b. the IRR of a project is equal to the firm's cost of capital if the NPV of a project is $0. c. the IRR must be greater than the cost of capital if the NPV of a project is negative. d. none of the above applies. O a. b. c. d